28653524820 has 288 divisors, whose sum is σ = 98736019200. Its totient is φ = 6942910464.

The previous prime is 28653524789. The next prime is 28653524839. The reversal of 28653524820 is 2842535682.

It is a super-2 number, since 2×28653524820² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2390001 + ... + 2401959.

It is an arithmetic number, because the mean of its divisors is an integer number (342833400).

Almost surely, 2^28653524820 is an apocalyptic number.

28653524820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28653524820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49368009600).

28653524820 is an abundant number, since it is smaller than the sum of its proper divisors (70082494380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28653524820 is a wasteful number, since it uses less digits than its factorization.

28653524820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12029 (or 12015 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 28653524820 in words is "twenty-eight billion, six hundred fifty-three million, five hundred twenty-four thousand, eight hundred twenty".